WO2002056495A3 - Assigning clusters of demodulation elements in a spread spectrum system - Google Patents

Assigning clusters of demodulation elements in a spread spectrum system Download PDF

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Publication number
WO2002056495A3
WO2002056495A3 PCT/US2002/000887 US0200887W WO02056495A3 WO 2002056495 A3 WO2002056495 A3 WO 2002056495A3 US 0200887 W US0200887 W US 0200887W WO 02056495 A3 WO02056495 A3 WO 02056495A3
Authority
WO
WIPO (PCT)
Prior art keywords
paths
spread spectrum
demodulation elements
virtual
path
Prior art date
Application number
PCT/US2002/000887
Other languages
French (fr)
Other versions
WO2002056495A2 (en
Inventor
Roland R. Rick
Serguei Glazko
Rohit Malhotra
Messay Amerga
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to AT02707459T priority Critical patent/ATE489777T1/en
Priority to KR1020037009338A priority patent/KR100885142B1/en
Priority to EP02707459A priority patent/EP1350336B1/en
Priority to AU2002241864A priority patent/AU2002241864A1/en
Priority to IL15685802A priority patent/IL156858A0/en
Priority to DE60238385T priority patent/DE60238385D1/en
Priority to MXPA03006281A priority patent/MXPA03006281A/en
Publication of WO2002056495A2 publication Critical patent/WO2002056495A2/en
Publication of WO2002056495A3 publication Critical patent/WO2002056495A3/en
Priority to IL156858A priority patent/IL156858A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing

Abstract

An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, may add one or more additional 'virtual' paths to a list of candidate paths when assigning demodulation elements. These 'virtual' paths are added as candidate paths even though a corresponding peak was not necessarily detected within a received spread spectrum system. The list of paths may include a first path having a time offset approximately equal to a time offset for one of the demodulation elements, and the virtual path having a short time separation from the first path. The time separation between the paths may be, for example, less than 2 chips.
PCT/US2002/000887 2001-01-11 2002-01-10 Assigning clusters of demodulation elements in a spread spectrum system WO2002056495A2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AT02707459T ATE489777T1 (en) 2001-01-11 2002-01-10 ALLOCATION OF DEMODULATING ELEMENT COLLECTIONS IN A SPREAD SPECTRUM SYSTEM
KR1020037009338A KR100885142B1 (en) 2001-01-11 2002-01-10 Assigning clusters of demodulation elements in a spread spectrum system
EP02707459A EP1350336B1 (en) 2001-01-11 2002-01-10 Assigning clusters of demodulation elements in a spread spectrum system
AU2002241864A AU2002241864A1 (en) 2001-01-11 2002-01-10 Assigning clusters of demodulation elements in a spread spectrum system
IL15685802A IL156858A0 (en) 2001-01-11 2002-01-10 Assigning clusters of demodulation elements in a spread spectrum system
DE60238385T DE60238385D1 (en) 2001-01-11 2002-01-10 DISTRIBUTION OF DEMODULATION ELEMENTS COLLECTIONS IN A SPREADING SPECTRUM SYSTEM
MXPA03006281A MXPA03006281A (en) 2001-01-11 2002-01-10 Assigning clustersof demodulation elements in a spread spectrum system.
IL156858A IL156858A (en) 2001-01-11 2003-07-09 Assigning clusters of demodulation elements in a spread spectrum system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US26140201P 2001-01-11 2001-01-11
US60/261,402 2001-01-11
US09/968,344 2001-09-28
US09/968,344 US6731676B2 (en) 2001-01-11 2001-09-28 Assigning clusters of demodulation elements in a spread spectrum system

Publications (2)

Publication Number Publication Date
WO2002056495A2 WO2002056495A2 (en) 2002-07-18
WO2002056495A3 true WO2002056495A3 (en) 2003-02-20

Family

ID=26948586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/000887 WO2002056495A2 (en) 2001-01-11 2002-01-10 Assigning clusters of demodulation elements in a spread spectrum system

Country Status (9)

Country Link
US (1) US6731676B2 (en)
EP (2) EP2237436A3 (en)
KR (2) KR101028975B1 (en)
AT (1) ATE489777T1 (en)
AU (1) AU2002241864A1 (en)
DE (1) DE60238385D1 (en)
IL (2) IL156858A0 (en)
MX (1) MXPA03006281A (en)
WO (1) WO2002056495A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7277471B2 (en) * 2001-01-11 2007-10-02 Qualcomm Incorporated Time-tracking for clustered demodulation elements in a spread spectrum system
US7340017B1 (en) * 2002-07-30 2008-03-04 National Semiconductor Corporation System and method for finger management in a rake receiver
US7181836B2 (en) * 2003-12-19 2007-02-27 General Electric Company Method for making an electrode structure
KR100630170B1 (en) * 2004-09-17 2006-09-29 삼성전자주식회사 A Method and An Apparatus for Managing Demodulation Timing of UE by cells In Asynchronous Mobile Telecommunication Syatem
US8406251B2 (en) * 2004-10-06 2013-03-26 Broadcom Corporation Method and system for processing multipath clusters
US7480356B2 (en) * 2004-12-08 2009-01-20 Telefonaktiebolaget L M Ericsson (Publ) Method of and system for path selection in rich multipath conditions
US7372895B2 (en) * 2004-12-08 2008-05-13 Telefonaktiebolaget Lm Ericsson (Publ) Method of and system for delay estimation with minimized finger allocation
US7693241B2 (en) 2005-10-31 2010-04-06 Qualcomm Incorporated Rake receiver finger assignment based on signal path concentration
US20080069188A1 (en) * 2006-09-15 2008-03-20 Meyer David R Virtual reference timing for multi-time based systems
US8369356B2 (en) * 2007-03-21 2013-02-05 Qualcomm Incorporated Dynamic management of receiver resources
US8126031B2 (en) * 2007-08-07 2012-02-28 Qualcomm Incorporated Time-tracking management of demodulation elements in a receive diversity enabled rake receiver

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896438A1 (en) * 1997-07-31 1999-02-10 Lucent Technologies Inc. Rake receiver finger assignment avoiding path tracking duplication
US6078611A (en) * 1997-09-16 2000-06-20 Motorola, Inc. Rake receiver and finger management method for spread spectrum communication

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5978423A (en) * 1996-02-02 1999-11-02 Telefoanktiebolaget Lm Ericsson Method and arrangement of signal tracking and a rake-receiver utilizing the arrangement
US6154455A (en) * 1997-12-24 2000-11-28 Nokia Mobile Phones Limited Prioritizing pilot set searching for a CDMA telecommunications system
US6269075B1 (en) * 1998-01-26 2001-07-31 Nokia Mobile Phones Limited Finger assignment in a CDMA rake receiver
JP2000165950A (en) * 1998-11-30 2000-06-16 Sony Corp Method for detecting pilot signal and radio communication terminal device
US6314130B1 (en) * 1999-04-28 2001-11-06 Dspc Technologies, Ltd. System and method for joint time tracking of multiple paths
US7184457B2 (en) * 2000-02-28 2007-02-27 Texas Instruments Incorporated Spread spectrum path estimation
US6834075B2 (en) * 2001-01-12 2004-12-21 Motorola, Inc. Method for improving multipath searcher speed

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896438A1 (en) * 1997-07-31 1999-02-10 Lucent Technologies Inc. Rake receiver finger assignment avoiding path tracking duplication
US6078611A (en) * 1997-09-16 2000-06-20 Motorola, Inc. Rake receiver and finger management method for spread spectrum communication

Also Published As

Publication number Publication date
KR101028975B1 (en) 2011-04-12
US6731676B2 (en) 2004-05-04
KR20030069211A (en) 2003-08-25
EP1350336B1 (en) 2010-11-24
EP2237436A3 (en) 2010-11-10
EP1350336A2 (en) 2003-10-08
IL156858A0 (en) 2004-02-08
IL156858A (en) 2009-12-24
KR100885142B1 (en) 2009-02-23
WO2002056495A2 (en) 2002-07-18
EP2237436A2 (en) 2010-10-06
KR20080090581A (en) 2008-10-08
ATE489777T1 (en) 2010-12-15
AU2002241864A1 (en) 2002-07-24
US20020126742A1 (en) 2002-09-12
MXPA03006281A (en) 2004-05-04
DE60238385D1 (en) 2011-01-05

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